Climate changed colder and wetter,people weakened by hunger and were led to diseases
I suppose it made the free states and slave states in some way even. When Missouri became a slave state they kept the north end of the Louisiana purchase free stated and banned slavery there.
Manifest Destiny
Have a nice day
There was little control over urban life, they also performed social services for the immigrants, and the cities needed the services they provided. They understood how to use the political system for their own good.
